Solved by pretty_pi

#	Title	# Solved	Avg. Tries
6672	Electricity	108	2.88
6790	Spies Like Us	12	1.75
6840	Who is in the middle?	4,684	1.33
6989	채점	262	3.65
7040	Layout	106	2.53
7287	Registration STANDARD	62,199	1.92
7453	4 Values whose Sum is 0	6,788	4.39
7469	K-th Number	1,836	3.07
7512	Prime	157	4.87
7562	Knight Moves STANDARD	27,249	1.90
7568	덩치	52,065	1.78
7569	토마토 STANDARD	32,624	2.33
7574	개구리	150	4.13
7576	토마토 STANDARD	52,705	2.67
7577	탐사	415	2.23
7578	공장	3,810	2.55
7579	앱 STANDARD	9,405	2.99
7626	Rectangles	662	4.08
7629	Ball Painting	30	1.37
7630	City Driving	29	2.66
7631	Drunken Walk	11	2.45
7662	Dual Priority Queue	13,135	4.52
7686	Dropping tests	36	2.17
7691	Cake Cutting	14	1.14
7727	Byephone	118	1.61
7744	Cakes	25	1.88
7771	Battleship	105	1.81
7786	Find the Sum	51	1.29
7805	Minimum Swap	71	1.73
7824	Playing With Stones	28	1.50
7873	Decision	31	1.97
7891	Can you add this?	6,243	1.22
7976	Sequence	163	2.85
8111	Ones And Zeros	1,149	1.75
8112	Ones And Zeros 2	341	3.08
8128	Subway	45	6.42
8136	Palindromes	27	4.70
8177	Ice Skates	121	1.72
8217	Meteors	443	4.30
8222	Distance	89	3.90
8330	Permutation	47	2.15
8370	Plane	8,990	1.12
8393	Sum STANDARD	167,394	1.56
8437	Julka	4,958	2.43
8452	그래프와 쿼리	255	3.78
8462	배열의 힘	929	2.41
8496	Godzilla	31	4.45
8535	Guessing Game	23	2.91
8545	Zadanie próbne	4,512	1.26
8871	Zadanie próbne 2	3,780	1.17

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